41. Which of the following best describes the significance of the Ediacaran biota?
(A) They are the first multicellular organisms.
(B) They represent a major increase in marine predation.
(C) They mark the beginning of complex animal life.
(D) They are the dominant life forms during the Cambrian explosion.
(E) They are primarily unicellular organisms.

答案：登入後查看
統計： A(1), B(1), C(4), D(3), E(1) #3429720